Account expired?

I have recently paid to extend my premium account yet, I am receiving a message, when I login, that says that my enterprise corporations are bign closed due to non-payment....

For some reason the game charged me 1GC to extend my enterprise membership....

Your payment keeps the account active. Each active account gets 1 free entity, so either your CEO or your Empire. Every other entity requires 1 GC per day to remain active. Pro tip, use boosters instead of paying gold coin directly. Each gold coin spent on a booster also extends the entity by 1 day. Make your CEO your free entity, and use population boosters on country to extend the country. That way you get a nice population boost with your extension.

before when I extended my membership, it kept both active. I wasn't paying 1 GC per day...

Its been this way as long as I remember and I first played in 2007.

Yeah John Galt is correct. Has been this way for as long as I can remember

Before, When I extended my account I am pretty sure I paid the monthly fee and that was it. Both were extended...